Acyclic serial data transmission of data words
The transmission time for parameter access depends on the number of connected devices and can take up to 5.7 s.
In profile S-7.A.5, the inverter parameters are exchanged via acyclic serial CTT2 services.
Device type | Device profile | Data width of payload data | Minimum bit rate with maximum Bit/s |
|---|---|---|---|
Double device | S-7.A.5 (CTT2) | 2 – 32 bytes (OUT) | 17 |
2 – 32 bytes (IN) | 17 |
The 12-byte Smart Parameter Access protocol (SPA) is transmitted at a transmission rate of 17 bits/s in a maximum time of 5.7 s.
t | Transmission time for a parameter, [t] = s |
N1 | Number of devices |
N2 | Number of inverters with a double device profile |
